Wow Ursula! I agree Hetty! Get that over to the database when you can. It really showcases the plant and I like the fruit and flower pic's a lot.
Of course you will want other opinions, but judging from the leaf and bract shape and the flowers and berries developing I'd swear I believe it is qudrangularis.
Its hard to believe this plant is actually in the grape family,.....Its one of those plant classifying mysterys to me like the Euphorbias. Are they diverse?...
Happy Gardening and Good morning